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Benton County, Oregon

Benton County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF
Government Unit Unit Type Jurisdiction Role Contact / Address
GUS Population: 98,899 (2024)
ID: 209184
County Official County Government
Contact: BUDGET MANAGER
PO BOX 3020, CORVALLIS OR 97339-3020
GUS Population: 61,993 (2024)
ID: 133202
Municipal Municipal Government Within County
Contact: PLANNING DIVISION
501 SW MADISON AVE, CORVALLIS OR 97333
GUS Population: 5,795 (2024)
ID: 173629
Municipal Municipal Government Within County
Contact: CITY MANAGER
PO BOX 400, PHILOMATH OR 97370-0400
GUS Population: 1,028 (2024)
ID: 173630
Municipal Municipal Government Within County
Contact: MAYOR
6030 NE WILLIAM R CARR ST, ADAIR VILLAGE OR 97330-9444
CITY OF MONROE
GUS Population: 677 (2024)
ID: 111589
Municipal Municipal Government Within County
Contact: MAYOR
PO BOX 486, MONROE OR 97456-0486